MIDDLEFIELD, Ohio, July 22, 2025 (GLOBE NEWSWIRE) -- Middlefield Banc Corp. (NASDAQ: MBCN) today reported financial results for the six months ended June 30, 2025. 2025 Second-Quarter Financial Highlights (on a year-over-year basis): ●Earnings per share increased 46.2% year-over-year to $0.76 per diluted share ●Asset quality improved from the 2024 fourth quarter with nonperforming assets to total assets decreasing by 32 basis points to 1.30% ●Net interest margin expanded 37 basis points to 3.88% and increa ...